Self-sealing coupling



Get. 12, 1948.

SELF-SEALING COUPLING Filed March 28, 1945 icy En- 4a e2 9: 20 32 7o 72Patented Oct. 12, 1948 SELF- SEALING COUPLING Benjamin A. Main, Jr.,Jackson, Mich assignor,

by mesne assignments, to Aeroquip Corporation, Jackson, Mich, acorporation of Michigan Application March 28, 1945, Serial No. 585,308

1 Claim. 1

The present invention relates to improvements in self-sealing couplingsofthe type disclosed in United States Patent No. 2,208,286, granted toJulius Berger July 16, 1940. v

The objects and advantages of the present invention reside in thespecific details of construction, resulting in an improved design whichwill simplify the manufacture and reduce the cost by increasingpermitted tolerances and reducing the percentages of rejections inassembly without sacrificing performance.

These objects and advantages are to be found in the combination,construction and arrangement of parts and will be more fully treated inthe following specification and appended claim.

Referring to the drawings, in which one form of the invention isillustrated,

Fig. 1 is a side elevational view of the coupling parts in assembled orconnected position,

Fig. 2 is a vertical cross-sectional view of the coupling shown in Fig.1, and

Fig. 3 is a view similar to Fig. 2, showing the parts in theirdisconnected position.

The coupling shown in Fig. 1 is generally designated by referencecharacter Ill and comprises two separable parts I2 and I4 which are heldin assembled relationship by a nut I6, which when drawn up functions tomanipulate the valve parts to open the coupling for the through passageof As more clearly shown in Fig. 3, part I2 is made up or a nipple I8externally threaded at 20 and 22 and a socket 24, externally threaded at28 and internally threaded at 28. The threads 22 and 28 of the parts I8and 24 are threaded together until the shoulder 30 engages with theshoulder 82. An annular recess is provided between the parts l8 and 24,as at 34, to receive the sealing rings 36. In this manner a leak-proofjoint is provided which enables the parts I8 and 24 to be fabricatedseparately to provide for convenient assembly of the interior parts intothe enlarged chamber indicated at 38.

Partially defining the chamber 38 is a conical valve seat portion 40 anda cylindrical portion 42, A valve 44, conical portion 46 and acylindrical portion 48 are provided with an annular groove 50 to receivethe sealing ring 52. The spring 54 continuously urges the valve 44 inthe position shown in Fig. 3.

As is more clearly shown in the right-hand portion of Fig. 3, the partI4 is externally threaded at 58 and internally threaded at 58. At oneend of the outer body portion 80 is an enlargement 42 providing ashoulder 84 and an annular recess 2 66 in which is located the sealingring 88. The inner cylindrical wall I0 defines a chamber 12.

A tubular valve part I4 has a cylindrical body portion I6 threaded atone end to threadingly engage with the internal threaded portion 58 ofthe part I4. The opposite end of the valve part I4 is closed except fortransverse ports I8, which are slightly enlarged to provide acylindrical end portion having defined therein an annular recess 82 toreceive the sealing ring 84. A shoulder 86 is defined between thecylindrical portions of different diameters.

The sleeve valve part 88 is in sliding fit with the valve part I4 aswell as with the cylindrical inner wall I0 of the part I4. At one'endthe internal diameter is reduced to provide a shoulder 90 for engagingwith the shoulder 88 at the outward position of the sleeve 88 under thestress of the spring 92. The sealing rings 88- and 84 internally andexternally seal with the sleeve 88.

The part I2 is provided with a cylindrical nose portion 94 having anexternal diameter corresponding to the diameter of the sleeve 88. Whenthe parts I2 and I4 are brought into the connected position, shown inFig, 2, through manipulation of the nut I6, the cylindrical nose portion94 abuts against the outer end of the sleeve 88 to displace the same inthe manner shown in Fig. 2, bringing the ports I8 into communicationwith the chamber 38. With the parts in this position the sealing ring 68is now sealing upon the cylindrical nose'portion 34 in lieu of the outersurface of the sleeve 88. Upon backing on the nut IS in the positionshown in Fig. 2, the parts assume their disconnected position shown inFig. 3.

Having described the details of construction of my improved self-sealingcoupling, what I claim as new and desire to be protected by Letters.

Patent is:

In a self-sealing coupling of the class described, a pair of separabletubular body parts, a fixed valve part in one of said body parts, amovable valve part in the other of said body parts, the latter having acylindrical nose portion telescoping into the other body part when thetwo parts are connected, said valve parts having abutting complementaryfaces, said fixed valve part having a cylindrical outer headportionh'aving radial ports defined therein, a cylindrical sleeveslidable over said cylindrical outer portion to close said ports andhaving a plain cylindrical outer surface, the latter being co-extensivewith said cylindrical nose portion of the other body part when the twoparts are connected and the abutment of said nose portion with saidsleeve cover said radial ports upon such connection, the sleeve having apiston fit within its body part, a spring for restoring the sleeve toits port closing position when the body parts are disconnected, aperipheral groove located in said cylindrical head. a sealing ring insaid groove to provide a seal between said sleeve and head portion, ashoulder back of said head portion, an inwardly directed shoulder onsaid sleeve engaging with said first shoulder to limit outward movementof said sleeve, a peripheral groove on the interior surface of the bodypart carrying said sleeve and adiacent the end of this body partcontaining its fixed valve part, and a sealing ring in said grooveREFERENCES CITED 'I 'he following references are of record in the fileof this patent:

